Worldwide, 663 million people lack access to improved drinking water. The WHO/UNICEF Joint Monitoring Programme defines an improved drinking water source as “one that, by nature of its construction or through active intervention, is protected from outside contamination, in particular from contamination with faecal matter.”
Globally, drinking water access is improving – with 91% of the global population using an improved drinking water source – up from 76% in 1990.
About half of the populations without access to improved drinking water are in Sub-Saharan Africa (319 million).
Ten percent of the world's population does not have access to clean water adn more than 90% of those families live in remote rural areas.